It's actually nasal saline...to moisten the nasal passages. Perfect!is it saline sold for contact lens purposes?).
I did this today...mixed it up half and half with the Novolin R. I
I have to say I would recommend diluting it to the newcomer to this treatment. It is MUCH milder and easier to tolerate. The full strength doesn't burn much anymore and I'm accustomed to the smell, but this is just much less jarring overall.
Now, when/if you get up to higher doses, I'm sure it wouldn't make any sense. But starting out, I'm all for it.